All times are local unless otherwise stated.

Manam (Papua New Guinea) | 3 July-9 July 2019 | New Activity / Unrest Cite this Report
Manam Bismarck Volcanic Arc	According to the United Nations in Papua New Guinea an estimated 1,410 people from seven villages remained affected from the 27 June eruption of Manam; as many as 455 homes and many gardens had been destroyed. The Darwin VAAC reported that on 6 July ash plumes rose to 5.5-6.1 km (18,000-20,000 ft) a.s.l. and drifted W and NW. Sources: United Nations in Papua New Guinea, Darwin Volcanic Ash Advisory Centre (VAAC)
Semisopochnoi (United States) | 3 July-9 July 2019 | New Activity / Unrest Cite this Report
Semisopochnoi Aleutian Ridge Volcanic Arc	An increase in seismicity above background levels on 4 July at Semisopochnoi prompted AVO to raise the Aviation Color Code to Orange (the second highest level on a four-color scale) and the Volcano Alert Level to Watch (the second highest level on a four-level scale). Elevated seismicity continued through at least 9 July. No eruptive activity was detected in regional infrasound data, and cloudy conditions obscured satellite views of the volcano. [Correction: the Aviation Color Code was raised to Yellow and the Volcano Alert Level was raised to Advisory.] Source: US Geological Survey Alaska Volcano Observatory (AVO)
Stromboli (Italy) | 3 July-9 July 2019 | New Activity / Unrest Cite this Report
Stromboli Aeolian Volcanic Arc	An intense paroxysmal explosive sequence at Stromboli on 3 July resulted in injuries to tourists climbing the volcano and one death. INGV surveillance cameras recorded intensification of Strombolian activity at the N1 and N2 vents in Area N (north crater area, NCA) and vent S2 in Area C-S (South Central crater area), and spattering at S1 and C in Area C-S. An explosion from Area C-S at 1459 was followed by lava effusion and a flow that traveled into the upper part of Sciara del Fuoco. At different times during 1543-1545 lava overflowed from all vents and a strong explosion occurred at N1 at 1545. The paroxysmal phase began at 1546; two lateral blasts presumably from Area C-S were recorded at 1546:10 and 1546:20, just 10 seconds apart from each other. The main paroxysmal explosion, at 1546:40 ejected incandescent material that fell onto the flanks and generated an ash plume rose 4 km above the summit that drifted SW. Material from the lateral explosions and eruption column collapse generated two highly turbulent pyroclastic flows that reached the sea. Hot material set fire to vegetation on the W side of the island. Strombolian activity resumed at 1559, though the explosions were more intense than normal. Spattering from Area C-S continued on 4 July, feeding lava flows that continued to enter the ocean. Sources: Sezione di Catania - Osservatorio Etneo (INGV), Reuters
Ulawun (Papua New Guinea) | 3 July-9 July 2019 | New Activity / Unrest Cite this Report
Ulawun Bismarck Volcanic Arc	RVO reported that diffuse white plumes rose from Ulawun’s summit crater and the North Valley vent during 1-4 July, and from the summit only during 5-9 July. The seismic station located 11 km NW of the volcano recorded three volcanic earthquakes and some sporadic, short-duration, volcanic tremors during 1-3 July. The seismic station 2.9 km W of the volcano was restored on 4 July and recorded small sub-continuous tremors. Some discrete high-frequency volcanic earthquakes were also recorded on most days. Sulfur dioxide emissions were 100 tonnes per day on 4 July. According to the United Nations in Papua New Guinea 7,318 people remained displaced within seven sites because of the 26 June eruption. Sources: Rabaul Volcano Observatory (RVO), United Nations in Papua New Guinea

Aira (Japan) | 3 July-9 July 2019 | Continuing ActivityCite this Report
Aira Ryukyu Volcanic Arc	JMA reported that at 1044 on 4 July an explosion at Minamidake crater (at Aira Caldera’s Sakurajima volcano) generated an ash plume that rose 3.2 km above the crater rim and ejected material 1.1 km from the vent. The Alert Level remained at 3 (on a 5-level scale). Source: Japan Meteorological Agency (JMA)
Asosan (Japan) | 3 July-9 July 2019 | Continuing ActivityCite this Report
Asosan Nankai Volcanic Arc	JMA reported that minor explosive events on 4 and 5 July at Asosan’s Nakadake Crater ejected sediment from the vent. Sulfur dioxide emissions were 1,300 tons per day on 5 July. The Alert Level remained at 2 (on a scale of 1-5). Source: Japan Meteorological Agency (JMA)
Colima (Mexico) | 3 July-9 July 2019 | Continuing ActivityCite this Report
Colima Trans-Mexican Volcanic Belt	Centro Universitario de Estudios e Investigaciones de Vulcanologia - Universidad de Colima reported that intermittent steam-and-gas emissions, mainly from the NE side of the crater, and three small explosions were recorded during 29 June-5 July. A thermal camera located S of the volcano recorded thermal anomalies associated with emissions. Weather conditions sometimes prevented observations of the crater. Source: Centro Universitario de Estudios Vulcanológicos (CUEV) - Universidad de Colima
Dukono (Indonesia) | 3 July-9 July 2019 | Continuing ActivityCite this Report
Dukono Halmahera Volcanic Arc	Based on satellite and wind model data, and notices from PVMBG, the Darwin VAAC reported that during 3-9 July ash plumes from Dukono rose to altitudes of 1.8-2.1 km (6,000-7,000 ft) a.s.l. and drifted in multiple directions. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to remain outside of the 2-km exclusion zone. Sources: Darwin Volcanic Ash Advisory Centre (VAAC), Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Ebeko (Russia) | 3 July-9 July 2019 | Continuing ActivityCite this Report
Ebeko Kuril Volcanic Arc	Volcanologists in Severo-Kurilsk (Paramushir Island), about 7 km E of Ebeko, observed explosions during 28 June-5 July that sent ash plumes up to 4.5 km (14,800 ft) a.s.l. The plumes drifted in multiple directions. A thermal anomaly was visible in satellite images on 29 June and 1 July. The Aviation Color Code remained at Orange (the second highest level on a four-color scale). Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Ibu (Indonesia) | 3 July-9 July 2019 | Continuing ActivityCite this Report
Ibu Halmahera Volcanic Arc	The Darwin VAAC reported that on 6 July an ash plume from Ibu rose to 2.1 km (7,000 ft) a.s.l. and drifted N, based on satellite images and weather models. An intermittent thermal anomaly was also visible. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Karymsky (Russia) | 3 July-9 July 2019 | Continuing ActivityCite this Report
Karymsky Eastern Kamchatka Volcanic Arc	KVERT reported that a thermal anomaly over Karymsky was identified in satellite images during 30 June-3 July. The Aviation Color Code remained at Orange (the second highest level on a four-color scale). Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Klyuchevskoy (Russia) | 3 July-9 July 2019 | Continuing ActivityCite this Report
Klyuchevskoy Eastern Kamchatka Volcanic Arc	KVERT reported that a weak thermal anomaly over Klyuchevskoy was visible in satellite images during 1-3 July, and ash plumes drifted as far as 85 km E and SE during 1-2 July. The Aviation Color Code remained at Orange (the second highest level on a four-color scale). Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Krakatau (Indonesia) | 3 July-9 July 2019 | Continuing ActivityCite this Report
Krakatau Sunda Volcanic Arc	PVMBG reported that Anak Krakatau’s seismic network recorded eight eruptive events during 1-7 July. The events were not followed by visible ash emissions, though observations were hindered by weather conditions. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to remain outside of the 2-km radius hazard zone from the crater. Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Merapi (Indonesia) | 3 July-9 July 2019 | Continuing ActivityCite this Report
Merapi Sunda Volcanic Arc	PVMBG reported that during 28 June-4 July the lava-dome volume at Merapi did not significantly change and was an estimated 475,000 cubic meters, based on analyses of drone images taken on 4 July. Extruded lava fell into the upper parts of the SE flank, generating one block-and-ash flow that traveled 1.1 km down the Gendol drainage on 1 July. White plumes rose as high as 200 m above the summit. The Alert Level remained at 2 (on a scale of 1-4), and residents were warned to remain outside of the 3-km exclusion zone. Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Nevados de Chillan (Chile) | 3 July-9 July 2019 | Continuing ActivityCite this Report
Nevados de Chillan Andean Southern Volcanic Arc	ONEMI and SERNAGEOMIN reported that an explosive event at Nevados de Chillán’s Nicanor Crater recorded at 0550 on 9 July was associated with a long-period earthquake signal. The explosion ejected incandescent material onto areas near the crater. The Alert Level remained at Orange, the second highest level on a four-color scale, and residents were reminded not to approach the crater within 3 km. ONEMI maintained an Alert Level Yellow (the middle level on a three-color scale) for the communities of Pinto, Coihueco, and San Fabián. Sources: Oficina Nacional de Emergencia-Ministerio del Interior (ONEMI), Servicio Nacional de Geología y Minería (SERNAGEOMIN)
Sangay (Ecuador) | 3 July-9 July 2019 | Continuing ActivityCite this Report
Sangay Andean Northern Volcanic Arc	IG reported that a new eruption at Sangay began on 7 May and was continuing as of 3 July. Activity was concentrated at two eruptive centers: the Central Crater and the Ñuñurcu dome (located 190 m SSE of Central Crater). Sporadic explosions at Central Crater produced ash plumes that rose as high as 1.1 km above the crater rim and drifted W and SW. The Ñuñurcu dome fed at least three lava flows that traveled down the SE flank. Collapses of the lava-flow fronts generated small pyroclastic flows and numerous block flows that traveled as far as 3,888 m elevation. Staff of the Parque Nacional Sangay observed atypical sedimentation consisting of volcanic material at the confluence of the Upano River and its tributary, the Volcán River, 23 km SE of the summit. Areas of steaming in the Volcán River were possibly from hot blocks originating from the volcano. Residents of Macas (42 km SSE) reported increased turbidity in the Upano from pyroclastic material. Source: Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN)
Sangeang Api (Indonesia) | 3 July-9 July 2019 | Continuing ActivityCite this Report
Sangeang Api Sunda Volcanic Arc	The Darwin VAAC reported that during 4-5 July ash plumes from Sangeang Api were visible in satellite images rising to 2.1-2.3 km (7,000-8,000 ft) a.s.l. and drifting SW and W. During 6-9 July multiple ash plumes rose to 3-4.6 km (10,000-15,000 ft) a.s.l. and drifted N, NW, and SW. Thermal anomalies were visible on 4 and 8 July. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Sheveluch (Russia) | 3 July-9 July 2019 | Continuing ActivityCite this Report
Sheveluch Eastern Kamchatka Volcanic Arc	KVERT reported that a thermal anomaly over Sheveluch’s lava dome was identified daily in satellite images during 28 June-5 July. The Aviation Color Code remained at Orange (the second highest level on a four-color scale). Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

Weekly Reports Archive

Since the Weekly Volcanic Activity Report began in November 2000, there have been 20,322 individual reports over 1,229 weeks (average of 17 per week) on 336 different volcanoes.

Use the dropdowns to choose the year and week for archived Weekly Reports.

 News Feeds and Google Placemarks

 Criteria & Disclaimers

The Weekly Volcanic Activity Report does not necessarily include all volcanic activity that occurred on Earth during the week. More than a dozen volcanoes globally have displayed more-or-less continuous eruptive activity for decades or longer, and such routine activity is typically not reported here. Moreover, Earth's sea-floor volcanism is seldom reported even though in theory it represents the single most prolific source of erupted material. The Weekly Volcanic Activity Report summarizes volcanic activity that meets one or more of the following criteria:

- A volcano observatory raises or lowers the alert level at the volcano.
- A volcanic ash advisory has been released by a volcanic ash advisory center (VAAC) stating that an ash cloud has been produced from the volcano.
- A verifiable news report of new activity or a change in activity at the volcano has been issued.
- Observers have reported a significant change in volcanic activity. Such activity can include, but is not restricted to, pyroclastic flows, lahars, lava flows, dome collapse, or increased unrest.

Volcanoes are included in the "New Activity/Unrest" section of the Weekly Volcanic Activity Report if the activity occurs after at least 3 months of quiescence. Once a volcano is included in the "New Activity/Unrest" section, updates will remain in that section unless the activity continues for more than 1 month without escalating, after which time updates will be listed in the "Continuing Activity" section. Volcanoes are also included in the "New Activity/Unrest" section if the volcano is undergoing a period of relatively high unrest, or increasing unrest. This is commonly equal to Alert Level Orange on a scale of Green, Yellow, Orange, Red, where Red is the highest alert. Or alert level 3 on a scale of 1-4 or 1-5.

It is important to note that volcanic activity meeting one or more of these criteria may occur during the week, but may not be included in the Weekly Volcanic Activity Report because we did not receive a report.

1. The Weekly Volcanic Activity Report is intended to provide timely information about global volcanism on a weekly basis. Consequently, the report is generated rapidly by summarizing volcanic reports from various sources, with little time for fact checking. The accuracy of the Weekly Volcanic Activity Report is dependent upon the quality of the volcanic activity reports we receive. Reports published in the Bulletin of the Global Volcanism Network are cover longer time periods and are more carefully reviewed, although all of the volcanoes discussed in the Weekly Volcanic Activity Report are not necessarily reported in the Bulletin. Because of our emphasis on rapid reporting on the web we have avoided diacritical marks. Reports are updated on the Weekly Volcanic Activity Report web page as they are received, therefore information may be included regarding events that occurred before the current report period.

2. Rapidly developing events lead to coverage that is often fragmentary. Volcanoes, their eruptions, and their plumes and associated atmospheric effects are complex phenomena that may require months to years of data analysis in order to create a comprehensive summary and interpretation of events.

3. Preliminary accounts sometimes contain exaggerations and "false alarms," and accordingly, this report may include some events ultimately found to be erroneous or misleading.

4. Many news agencies do not archive the articles they post on the Internet, and therefore the links to some sources may not be active. To obtain information about the cited articles that are no longer available on the Internet contact the source.

5. USGS Disclaimer Statement for this Website:

Information presented on this website is considered public information and may be distributed or copied. Use of appropriate byline/photo/image credit is requested. We strongly recommend that USGS data be acquired directly from a USGS server and not through other sources that may change the data in some way. While USGS makes every effort to provide accurate and complete information, various data such as names, telephone numbers, etc. may change prior to updating. USGS welcomes suggestions on how to improve our home page and correct errors. USGS provides no warranty, expressed or implied, as to the accuracy, reliability or completeness of furnished data.

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U.S. Department of the Interior, U.S. Geological Survey, Reston, VA, USA
URL: https://volcano.si.edu/reports_weekly.cfm

 Acronyms and Abbreviations

a.s.l. - above sea level

AVO - Alaska Volcano Observatory

AVHRR - Advanced Very High Resolution Radiometer

CENAPRED - Centro Nacionale de Prevencion de Desastres (México)

CONRED - Coordinadora Nacional para la Reducción de Desastres

COSPEC - Correlation Spectrometer

CVGHM (formerly VSI) - Center of Volcanology and Geological Hazard Mitigation

CVO - Cascades Volcano Observatory (USGS)

GMS - Geostationary Meteorological Satellite

GOES - Geostationary Operational Environmental Satellite

GVO - Goma Volcano Observatory

GVP - Global Volcanism Program (Smithsonian Institution)

HVO - Hawaiian Volcano Observatory (USGS)

ICE - Instituto Costarricense de Electricidad (Costa Rica)

IG - Instituto Geofísico (Ecuador)

IGNS - Institute of Geological and Nuclear Sciences (New Zealand) - now GNS Science

INETER - Instituto Nicaragüense de Estudios Territoriales (Nicaragua)

INGEMMET - Instituto Geológical Minero y Metalúrgico (Peru)

INGEOMINAS - Instituto Colombiano de Geología y Minería (Colombia)

INGV-CT - Istituto Nazionale di Geofisica e Vulcanologia - Sezione di Catania (Italy)

INSIVUMEH - Instituto Nacional de Sismologia, Vulcanologia, Meteorologia e Hidrologia (Guatemala)

IRD - Institut de Recherche pour le Développement (France)

JMA - Japanese Meteorological Agency

KEMSD - Kamchatkan Experimental and Methodical Seismilogical Department

KVERT - Kamchatkan Volcanic Eruption Response Team

M - magnitude

METEOSAT - Meteorological Satellite

MEVO - Mount Erebus Volcano Observatory

MODIS - Moderate Resolution Imaging Spectroradiometer

MVO - Montserrat Volcano Observatory

MWO - Meteorological Watch Office

NEIC - National Earthquake Information Center

NIED - National Research Institute for Earth Science and Disaster Prevention (Japan)

NOAA - National Oceanic and Atmospheric Administration

NOTAM - Notice to Airmen

OVDAS - Observatorio Volcanologico de los Andes del Sur (Chile)

OFDA - Office of US Foreign Disaster Assistance

ONEMI - Oficina Nacional de Emergencia - Ministerio del Interior (Chile)

OVPDLF - Observatoire Volcanologique du Piton de la Fournaise (France)

OVSICORI-UNA - Observatorio Vulcanologico y Sismologico de Costa Rica, Universidad Nacional (Costa Rica)

PHIVOLCS - Philippine Institute of Volcanology and Seismology (Philippines)

RSAM - Real-time Seismic Amplitude Measurement

RVO - Rabaul Volcano Observatory

SERNAGEOMIN - Servicio Nacional de Geologia y Mineria (Chile)

SIGMET - Significant Meteorological Information

SNET - Servicio Nacional de Estudios Territoriales (El Salvador)

SVERT - Sakhalin Volcanic Eruption Response Team (Russia)

USAID - US Agency for International Development

USGS - United States Geological Survey

UTC - Coordinated Universal Time

VAAC - Volcanic Ash Advisory Center

VAFTAD - Volcanic Ash Forecast Transport And Dispersion

VDAP - Volcano Disaster Assistance Program (USGS)

VHP - Volcano Hazards Program (USGS)

VRC - Volcano Research Center (Japan)